... Weld Neck FlangeVarieties: threaded flange, slip-on flange (SO), socket welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice flange, reducing flange, pad type flange, loose hubbed flange, welding plate flange ... .Size:supply as customers' request4.:Techniques:forged,castedConnect style:welding6.Quality:appearance of smooth,can work under presure for long time ...